controllers/install: Fix/Simplify link() function
controllers/install: Fix/Simplify link() function

steveklabnik/crates.io,rust-lang/crates.io,rust-lang/crates.io,Susurrus/crates.io,rust-lang/crates.io,achanda/crates.io,achanda/crates.io,Susurrus/crates.io,steveklabnik/crates.io,achanda/crates.io,steveklabnik/crates.io,Susurrus/crates.io,steveklabnik/crates.io,rust-lang/crates.io,Susurrus/crates.io,achanda/crates.io